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Some versions of ARM GCC which do support asm goto, do not support the %c specifier. Since we need the %c to support jump labels on ARM, detect that too in the asm goto detection script to avoid build errors with these versions. http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48637 Acked-by: Jason Baron <jbaron@redhat.com> Signed-off-by: Rabin Vincent <rabin@rab.in> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
22 lines
465 B
Bash
22 lines
465 B
Bash
#!/bin/sh
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# Test for gcc 'asm goto' support
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# Copyright (C) 2010, Jason Baron <jbaron@redhat.com>
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cat << "END" | $@ -x c - -c -o /dev/null >/dev/null 2>&1 && echo "y"
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int main(void)
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{
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#ifdef __arm__
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/*
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* Not related to asm goto, but used by jump label
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* and broken on some ARM GCC versions (see GCC Bug 48637).
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*/
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static struct { int dummy; int state; } tp;
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asm (".long %c0" :: "i" (&tp.state));
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#endif
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entry:
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asm goto ("" :::: entry);
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return 0;
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}
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END
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